Writing pen



FIG. 1 is a perspective view of a writing pen, with the writing tip retracted, showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a front view thereof;

FIG. 8 is a perspective view of my design of FIG. 1 with the barrel in an alternate position and the writing tip extended;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a top plan view of FIG. 8;

FIG. 11 is a bottom plan view of FIG. 8;

FIG. 12 is a rear view of FIG. 8;

FIG. 13 is a left side view of FIG. 8; and,

FIG. 14 is a front view of FIG. 8.

The writing tip depicted in FIGS. 8 through 14 has been shown for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a writing pen, as shown and described. 